Effect

Avalanche deals damage and is a decreased priority move, causing the user to attack after other Pokémon that are using ordinary priority moves. If the target had already damaged the user in the same turn, Avalanche's power is doubled to 120.

In other games

Similar to Bide, the user will store energy for a few turns and then release the energy to inflict damage, the amount of damage equaling the amount the user received during the "charging." The move will fail if the opposing Pokémon doesn't attack, if the user is under certain statuses like sleep or paralyze, or if the user faints.

In the anime

Avalugg's body glows light blue, and a dark cloud appears above the opponent. Chunks of white or clear ice then rain down from the cloud and strike the opponent. The move becomes more powerful if Avalugg was hit by an attack just before using it.